Inflatable obstacle



FIG. 1 is a front and right side perspective view of an inflatable obstacle in accordance with the new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a top, front, and left side perspective view thereof;

FIG. 4 is a rear and left side perspective view thereof; and,

FIG. 5 is a rear and right side perspective view thereof.

The bottom view is flat and unornamented and forms no part of the claimed design. The parts of the figures shown in broken-line perimeter illustrate portions of the inflatable obstacle that form no part of the claimed design. 

CLAIM The ornamental design for an inflatable obstacle, as shown and described. 